What is Cybersecurity?
A Protecting networks from physical damage B Protecting computer systems from digital attacks and data theft C Creating network cables D Managing computer hardware
Cybersecurity is the practice of protecting computer systems and networks from digital attacks, malware, and unauthorized access.
What is an 'Interface' in OOP?
A A graphical display B A contract that specifies methods a class must implement C A type of variable D A database connection
An interface is an abstract type that defines a set of methods that implementing classes must provide.
What does JSON stand for?
A Java Source Object Notation B JavaScript Object Notation C Java Standard Object Network D JavaScript Online Notation
JSON stands for JavaScript Object Notation, a lightweight data format for data exchange.
What is the function of a 'Router' in networking?
A To store data B To direct data packets between networks C To create websites D To encrypt files
A router is a networking device that directs data packets between different networks based on IP addresses.
What is Machine Learning?
A Programming machines to perform tasks B Teaching machines to learn from data and make predictions C Manufacturing computers D Operating heavy machinery
Machine Learning is a subset of AI that enables systems to learn from data and improve performance without explicit programming.
What is the purpose of Unit Testing?
A To test entire applications B To test individual components or functions C To design user interfaces D To manage databases
Unit testing involves testing individual units or components of code in isolation to ensure they work correctly.
A train travels 120 km in 2 hours and then 150 km in 3 hours. What is the average speed of the train?
A 54 km/h B 55 km/h C 56 km/h D 57 km/h
Total distance = 120 + 150 = 270 km. Total time = 2 + 3 = 5 hours. Average speed = 5 270
If a number is divisible by both 12 and 18, it must be divisible by:
A 24 B 36 C 48 D 54
LCM of 12 and 18 = 36. Any number divisible by both 12 and 18 must be divisible by their LCM, which is 36
What is the compound interest on Rs. 10,000 at 10% per annum for 2 years?
A Rs. 2,000 B Rs. 2,100 C Rs. 2,200 D Rs. 2,300
CI = P[(1 + r/100)^n - 1] = 10000[(1.1)^2 - 1] = 10000[0.21] = Rs. 2,100
If 5 workers can complete a job in 12 days, how many days will 8 workers take?
A 7 days B 7.5 days C 8 days D 8.5 days
Work = 5 × 12 = 60 worker-days. Days for 8 workers = 8 60
A shopkeeper buys an item at Rs. 400 and sells it at Rs. 520. What is his profit percentage?
A 25% B 28% C 30% D 32%
Profit = 520 - 400 = 120. Profit% = (400 120
What is the missing number in the series: 2, 6, 12, 20, ?, 42
A 28 B 30 C 32 D 35
Series follows n(n+1): 1×2=2, 2×3=6, 3×4=12, 4×5=20, 5×6=30, 6×7=42
If a:b = 3:4 and b:c = 5:6, then a:b:c is:
A 15:20:24 B 3:4:5 C 15:12:24 D 10:15:18
a:b = 3:4, b:c = 5:6. Multiply first by 5 and second by 4: a:b = 15:20, b:c = 20:24. So a:b:c = 15:20:24
In a class of 50 students, 30 study Math and 25 study Science. How many study both?
A 5 B 10 C 15 D 20
Using set theory: n(M∪S) = n(M) + n(S) - n(M∩S). 50 = 30 + 25 - n(M∩S). n(M∩S) = 5
What is the value of (2.5)² - (1.5)² / 2?
A 2 B 2.5 C 3 D 3.5
(2.5)² - (1.5)² / 2 = [6.25 - 2.25] / 2 = 2 4
If x² + 1/x² = 7, then x + 1/x is:
A 3 B ±3 C ±2 D 2
(x + 1/x)² = x² + 2 + 1/x² = 7 + 2 = 9. So x + 1/x = ±3
Which number is NOT a perfect square?
A 144 B 169 C 195 D 196
144=12², 169=13², 196=14², but 195 is not a perfect square (√195 ≈ 13.96)
Find the next number in the sequence: 1, 1, 2, 3, 5, 8, ?
A 11 B 12 C 13 D 14
This is the Fibonacci sequence where each number is the sum of the previous two: 5+8=13
If 30% of x is 45, then x is:
A 115 B 125 C 135 D 150
0.30 × x = 45. x = 0 45
A man walks 5 km north, then 3 km east, then 5 km south. How far is he from his starting point?
A 3 km B 5 km C 8 km D 13 km
After north and south movements (cancel out), he is only 3 km east of starting point
