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Sections: General AptitudeCore SubjectEngineering Mathematics
Q1. General Aptitude
If 3x + 2 = 11, then x = ?
Correct Answer: B
3x = 9 -> x = 3.
Q2.
Which data structure is used for implementing recursion?
A. Queue
B. Array
C. Stack
D. Linked List
Correct Answer: C
Recursion uses the call stack (LIFO) to store function call frames and return addresses.
Q3.
The output of XOR gate with inputs (1,1) is:
A. 1
B. 0
C. High impedance
D. Don't care
Correct Answer: B
XOR: output 1 when inputs differ, 0 when same. 11 = 0.
Q4.
What is the time complexity of binary search on a sorted array of n elements?
A. O(n)
B. O(log n)
C. O(n^2)
D. O(n log n)
Correct Answer: B
Binary search divides the search space in half each iteration, giving O(log n) time complexity.
Q5.
A transistor has three terminals: base, collector, and:
A. Gate
B. Drain
C. Emitter
D. Source
Correct Answer: C
BJT terminals: Base, Collector, Emitter. FET: Gate, Drain, Source.
Q6. General Aptitude
The perimeter of a square is 40 cm. Its area is:
A. 80 cm^2
B. 160 cm^2
C. 100 cm^2
D. 200 cm^2
Correct Answer: C
Side = 40/4 = 10 cm. Area = 10^2 = 100 cm^2.
Q7. General Aptitude
If x + y = 10 and xy = 21, then x^2 + y^2 is:
Correct Answer: C
x^2+y^2 = (x+y)^2 - 2xy = 100 - 42 = 58.
Q8. General Aptitude
Choose the correct spelling:
A. Mischeivous
B. Mischievious
C. Mischievous
D. Mischevous
Correct Answer: C
Correct spelling: Mischievous.
Q9.
Which process is used to make threads on a bolt?
A. Milling
B. Drilling
C. Threading
D. Grinding
Correct Answer: C
Threading (using dies) cuts external threads on bolts and rods.
Q10.
Which scheduling algorithm is non-preemptive?
A. Round Robin
B. FCFS
C. Shortest Remaining Time First
D. Priority (Preemptive)
Correct Answer: B
First Come First Serve (FCFS) is non-preemptive - once a process gets the CPU, it runs until completion or I/O.
Q11. General Aptitude
A die is rolled once. Probability of getting an even number is:
Correct Answer: B
Even: 2,4,6 (3 outcomes). P = 3/6 = 1/2.
Q12.
The main function of an operating system is:
A. Compiling programs
B. Providing internet access
C. Managing hardware resources
D. Running applications
Correct Answer: C
The OS manages CPU, memory, I/O devices, and provides resource allocation and protection.
Q13.
A 4-bit R-2R DAC uses resistors of values:
A. Only R
B. Only 2R
C. R and 2R
D. R, 2R, 4R
Correct Answer: C
R-2R ladder DAC uses only R and 2R resistors for binary-weighted conversion.
Q14.
Which of the following is a universal gate?
Correct Answer: D
NAND and NOR are universal gates - any Boolean function can be implemented using only NAND (or only NOR) gates.
Q15.
In a min-heap, the smallest element is at:
A. Root
B. Leftmost leaf
C. Rightmost leaf
D. Last node
Correct Answer: A
Min-heap property: parent children, so root is always the minimum element.