BUET MSc in IICT Admission Test, April 2021 all Questions and 100% correct Answers
BUET MSc in IICT Admission Test 2021 Questions and Answers
Total Questions: 60
Time: 40 Min
Exam Date: July 1, 2021
a) 4 s
b) 8 s
c) 1/2 s
d) None of these
Answer: b) 8 s
2. How many valid hosts are available for the network segment 192.166.2.16/28?
a) 16
b) 8
c) 15
d) 14
Answer: d) 14
3. What is the output of the following code segment:
string cars[4] = {"Volvo", "BMW", "Ford", "Mazda"};
cout<<cars[3];
cout<<cars[2];
a) Mazda, Ford
b) Ford BMW
c) MazdaFord
d) Mazda Ford
Answer: c) MazdaFord
4. Which circuit can be used as a parallel to the serial converter?
a) A decoder
b) An encoder
c) Demultiplexer
d) Multiplexer
Answer: d) Multiplexer
5. Which function in the following expression will be called first?
a = func3(6)-func2(4,5)/func1(1,2,3);
a) func1();
b) func2();
c) func3();
d) Cannot be predicted
Answer: d) Cannot be predicted
6. An organization is granted block 130.34.12.64 / 26. Find the no. of addresses for the whole network.
a) 128
b) 32
c) 256
d) None
Answer: c) 256
7. Difference between Latch and Flipflop is:
a) Flipflop has a clock but Latch doesn’t have
b) Flipflop is edge-triggered but Latch is level triggered
c) Both are true
d) None are true
Answer: c) Both are true
8. Which of the following sequence that a microprocessor follows?
a) Fetch, decode, execute
b) Fetch, execute, decode
c) Decode, fetch, execute
d) Execute, decode, fetch
Answer: a) Fetch, decode, execute
9. If the message bit is 111 then the Even-parity bit will be:
a) 1111
b) 1
c) 0
d) None
Answer: b) 1
10. What is the content of Stack Pointer (SP)?
a) Address of the current instruction
b) Address of the next instruction
c) Address of the top element of the stack
d) Size of the stack.
Answer: c) Address of the top element of the stack
11. An address in the main memory is called--
a) Physical address
b) Logical address
c) Memory address
d) Word address
Answer: a) Physical address
12. Which of the following format is usually used to store data?
a) Decimal
b) BCD
c) Octal
d) Hexadecimal
Answer: b) BCD
13. If in an RLC series circuit source voltage 100sinωt V, Resistance 10 Ohm, inductive reactance 10 ohm and capacitive reactance 10 ohm then current in the circuit will be:
a) 10 A
b) 3.33 A
c) 3.33sinωt A
d) 10 sinωt A
Answer: 10 A
14. The voltage induced in an inductor is represented as,
a) product of its inductance and current through it
b) ratio of its inductance to the current through it.
c) ratio of current through it to its inductance.
d) product of its inductance and rate of change of current through it.
Answer: d) product of its inductance and rate of change of current through it.
15. What will be the output of the following C code?
#include<stdio.h>
int main()
{
register static int i = 10;
i = 11;
printf("%d\n", i);
return 0;
}
a) 10
b) Compile-time error
c) Undefined behavior
d) 11
Answer: b) Compile-time error
16. ………………. is a group of networks and routers under the authority of a single administration.
a) An autonomous system
b) An Area
c) A System
d) Both an autonomous system and an area
Answer: a) An autonomous system
17. Bridges are used at ……………….. layer.
a) Physical layer
b) MAC layer
c) Network layer
d) Transport layer
Answer: b) MAC layer
18. DMA stands for?
a) Direct Memory Access
b) Direction Memory Access
c) Dictate Memory Accumulator
d) Direct Memory Accumulator
Answer: a) Direct Memory Access
19. A D flip-flop is having three inputs D, CLK, and CLR Which input is asynchronous:
a) D
b) CLK
c) CLR
d) None
Answer: c) CLR
20. Superposition principle states that at a time __________ source(S) acts.
a) all the given sources
b) only voltage sources
c) only one source
d) only current sources
Answer: c) only one source
21. At __________ frequencies the parallel R-L circuit behaves as purely resistive.
a) low very
b) low
c) high
d) very high
Answer: d) very high
22. A number of operations processes per second by a processor is called-
a) Instruction processor
b) Bandwidth
c) Clock Speed
d) Frequency
Answer: c) Clock Speed
23. Which of the following is the correct syntax to pass a Function Pointer as an argument?
a) void pass(int (*fptr)(int, float, char)){}
b) void pass(*fptr(int, float, char)){}
c) void pass(int (*fptr)){}
d) void pass(*fptr){}
Answer: a) void pass(int (*fptr)(int, float, char)){}
24. What will be the output of the following C code?
#include<stdio.h>
int mul(int a, int b, int c)
{
return a * b * c;
}
int main()
{
int (*function_pointer)(int, int);
function_pointer = mul;
printf("The product of three numbers is: %d\n", function_pointer(2, 3));
return 0;
}
a) Output: The product of three numbers is: 24
b) The code is incorrect
c) Output: The product of three numbers is: 6
d) None
Answer: The product of three numbers is: 9479040
25. An electrical series circuit consists of a 100 V battery, 20-ohm resistance, and a 5 uF capacitance. The voltage drop across 20-ohm resistance is :
a) 5 V
b) 4 V
c) 0 V
d) 100 V
Answer: c) 0 V
26. Imaginary part of Admittance of an AC circuit is:
a) Resistance
b) conductance
c) Reactance
d) Susceptance
Answer: d) Susceptance
27. The maximum addressing capacity of a microprocessor that uses 16-bit database & 32-bit address base is:
a) 64 K.
b) 4 GB
c) Both 64 K and 4 GB
d) None of these
Answer: b) 4 GB
28. What will be the output of the following C code?
#include<stdio.h>
int main()
{
int x;
int i = 5;
int l = i /-2;
int k = i % -2;
printf("%d %d\n", l, k);
x = 5 % 1;
printf("%d\n", x);
return 0;
}
a) -2 1
b) -1 1
c) 1 -1
d) Implementation defined
Answer: a) -2 1
29. What will be the output of the following pseudocode?
Integer a, b
Set a = 15, b = 7
a = a mod (a - 3)
b = b mod (b - 3)
a = a mod 1
b = b mod 1
Print a + b
a) 15b) 7
c) 0
d) 2
Answer: c) 0
30. Generally, Dynamic RAM is used as main memory in a computer system as it:
a) Consumes less power
b) has higher speed
c) has lower cell density
d) needs refreshing circuitry
Answer: b) has higher speed
31. 2’s complement of 00000000 is:
a) 11111111
b) 10000000
c) 00000000
d) 00000001
Answer: c) 00000000
32. Which of the following is NOT passive elements?
a) Resistor
b) Bulb
c) Op-Amp
d) Electric Iron
Answer: Not Mentioned
33. How to convert a JK Flipflip to T Flipflop ?
a) by adding an NOT Gate
b) by adding an AND Gate
c) by adding an X-OR Gate
d) No extra gate is required
Answer: d) No extra gate is required
34. If object is passed by value ______________
a) Copy constructor is used to copy the values into temporary object
b) Copy constructor is used to copy the values into another object in the function
c) Reference to the object is used to access the values of the object
d) Reference to the object is used to created new object in its place
Answer: b) Copy constructor is used to copy the values into another object in the function
35. Suppose you have many 4/1 MUXes. You need a 16/1 MUX. How many 4/1 MUX youare required to build a 16/1 MUX :
a) 3
b) 4
c) 5
d) 6
Answer: c) 5
36. Consider an array of float. Calculate the difference between the address of the1st and 4th element, assuming float occupies 4 bytes of memory.
a) 12
b) 4
c) 16
d) 8
Answer: a) 12
37. In a Johnson counter :
a) the output of the first flipflop is connected to the input of the last flipflop
b) the output of the last flipflop is connected to the input of the first flipflop
c) the inverted output of the last flipflop is connected to the input of the first flipflop
d) None
Answer: c) the inverted output of the last flipflop is connected to the input of the first flipflop
38. IP Address of a network is 192.120.105.0. What will be the maximum subnet number fulfilling the condition that each subnet can accommodate at max 14 hosts-
a) 20
b) 32
c) 16
d) 8
Answer: c) 16
39. The term ‘%i’ is used for _____ data type too.
a) char
b) int
c) none of the above
d) float
Answer: b) int
40. You are working with 3 networks that have the network IDs 192.168.5.0,192.168.6.0 and 192.168.7.0. What subnet mask can you use to combine these addresses into one?
a) 255.255.252.0
b) 255.255.254.0
c) 255.155.240.0
d) 255.255.255.252
Answer: d) 255.255.255.252
41. In an IP packet, what is the maximum size of an IP header?
a) 20B,
b) 4B,
c) 14B,
d) 60B
Answer: d) 60B
42. If we apply 0001 to a to the input of a seven-segment decoder then what will be the outputs,
a) 0110000 for a seven-segment display with common-cathode
b) 1001111 for a seven-segment display with common-anode
c) Both A and B are true
d) None are true
Answer: c) Both a and b are true
43. What remains always local on the LAN and never goes through a router?
a) MAC address
b) IP Address
c) Logical Address
d) None of the above
Answer: a) MAC address
44. If class C inherits class B. And B has inherited class A. Then while creating the object of class C, what will be the sequence of constructors getting called?
a) Constructor of C then B, finally of A
b) Constructor of A then C, finally of B
c) Constructor of A then B, finally C
d) Constructor of C then A, finally B
Answer: c) Constructor of A then B, finally C
45. If IP address of a device is 172.192.20.10/20, then what will be the network address in which the device belongs?
a) 172.192.0.0
b) 172.192.16.10
c) 172.192.20.0
d) 172.192.16.0
Answer: d) 172.192.16.0
46. An electrical Y network consists of each arm's 1-ohm resistor. The equivalent Delta network will have each arm with:
a) 3 ohm
b) 1/3 ohm
c) 4 ohm
d) 1 ohm
Answer: d) 3 ohm
47. A Program Counter contains the number 825 and addresses part of the instruction contains the number 24. The effective address in the relative address mode, when an instruction is read from the memory is:
a) 849.
b) 850
c) 801
d) 802
Answer: b) 850
48. What will be the output of the following C code?
#include<stdio.h>
void main()
{
int k = 7;
int *p = &k;
int **m = &p;
printf("%d%d%d\n", k, *p, **m);
return 0;
}
a) 5 5 5
b) 5 5 junk value
c) 7 7 7
d) Compile-time error
Answer: c) 7 7 7
49. If V1=50sin (ωt+10) and V2=30sin (ωt+50) then :
a) V1 leads V2
b) V2 leads V1
c) V2 lags V1
d) V1 and V2 in phase
Answer: b) V2 leads V1
50. Which one is an example of routed protocol?
a) IP
b) RIP
c) IGRP
d) OSPF
Answer: a) IP
51. The average time required to reach a storage location in memory and obtain its contents is called the-
a) seek time
b) turnaround time
c) access time
d) transfer time
Answer: c) access time
52. Which routing protocol does not consume the bandwidth of the network?
a) A default routing
b) Dynamic routing
c) Static routing
d) None of the above
Answer: c) Static routing
53. Advantage of JK Flip-flop over SR Flipflop is:
a) It is faster than SR
b) It has no forbidden state
c) It has no toggle state
d) All of the above
Answer: b) It has no forbidden state
54. What is the expression for Thevenin’s current if there is an external resistance in series with the Rth?
a) Vth/It
b) Vth/ (Rth-R)
c) Vth/ (Rth+R)
d) Vth/Rth
Answer: c) Vth/ (Rth+R)
55. In priority encoder:
a) first bit is considered don’t care
b) higher priority bit is considered don’t care
c) lower priority bit is considered don’t care
d) None
Answer: c) lower priority bit is considered don’t care
56. Which of the following is NOT the components of a microprocessor?
a) ALU
b) Register Array
c) Hard Disk
d) Control Unit
Answer: c) Hard Disk
57. Assume A ̅ , B ̅ , C ̅ and D ̅ represent the complements of A, B, C, and D, respectively. Now in a 4-variable (ABCD) logic circuit K-map (AB makes Row andCD makes Column) the cell of first row and then the third column will be indicated by:
a) A B ̅ C D
b) A ̅ B ̅ C D ̅
c) A ̅ B ̅ C D
d) ABCD
Answer: c) A ̅ B ̅ C D
58. An instruction pipeline can be implemented by means of:
a) LIFO buffer
b) FIFO buffer
c) Stack
d) None of the above
Answer: b) FIFO buffer
59. Internet group management protocol (IGMP) ………………….. protocol.
a) An error reporting
b) A group management
c) A transmission
d) None of the above.
Answer: b) A group management
60. The r.m.s. value of alternating current is given by steady (D.C.) current which
when flowing through a given circuit for a given time produces.
a) the more heat than produced by A.C. when flowing through the same circuit,
b) the same heat as produced by A.C. when flowing through the same circuit,
c) the less heat than produced by A.C. flowing through the same circuit,
d) None
Answer: b) the same heat as produced by A.C. when flowing through the same circuit
Collected From:
Md. Muntasir Hasan
Lecturer, IICT, BUET