MAH CET MCA 2025 Previous Year Questions (PYQs) – Page 9 of 10
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What is the result of the binary subtraction 1100 − 1010 using 2's complement?
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Solution
Two’s complement of $1010$ is $\overline{1010}+1=0101+1=0110$.
$1100+0110=1,0010$ → drop carry ⇒ $0010$.
Which of the following is a correct way to declare a variable in C?
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Solution
In C language, variable declaration syntax is datatype variable_name;.
Hence, the correct declaration is int x;.
What is the main difference between a process and a thread?
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Solution
A process runs independently and has its own memory space, while threads share the same memory space of the process.
#include <stdio.h>
int main() {
printf("%d", 5 + 3 * 2);
return 0;
}
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Solution
According to the precedence of operators, multiplication (*) is evaluated before addition (+).
So, $5 + 3 * 2 = 5 + 6 = 11$.
Which data structure uses the FIFO (First In, First Out) principle?
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Solution
In FIFO, the element inserted first is removed first — this is the principle of a Queue.
Which register in a CPU holds the address of the next instruction to be executed?
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Solution
The Program Counter (PC) is a register that contains the address of the next instruction to be executed in the CPU.
Interval between the time of submission and completion of the job is called...
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Solution
The Turnaround Time is the total time taken from submission of a job to its completion.
________ is a technique of improving the priority of process waiting in Queue for CPU.
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Solution
Ageing is a technique used to gradually increase the priority of processes that wait in the ready queue for a long time, thus preventing starvation.
What traversal method is used to traverse a binary tree in the order: left subtree, root, right subtree?
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Solution
In Inorder Traversal, the nodes are visited in the order:
Left Subtree → Root → Right Subtree.
What does the term RISC stand for in computer architecture?
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Solution
RISC stands for Reduced Instruction Set Computer, a CPU design strategy that uses a small, highly optimized set of instructions to improve performance.
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