Master Computer Science & IT concepts: DBMS & SQL, Data Structures, Computer Networks, Operating Systems, Software Engineering, OOPs, and Network Security with detailed technical explanations.
Select your option below. Marking scheme: +1.00 positive, -0.25 negative.
What is the maximum number of elements present simultaneously in the operand stack while evaluating the postfix expression:
$$6\quad 2\quad 3\quad +\quad -\quad 3\quad 8\quad 2\quad /\quad +\quad *$$Which of the following algorithms is not used for finding a Minimum Spanning Tree (MST)?
Which ACID property ensures that a transaction brings the database from one valid state to another, maintaining all predefined rules?
Which schema model is widely used in traditional data warehouse design for organizing fact tables and dimension tables?
Which authorization framework is commonly used in modern web applications to enable token-based access and is often integrated into Single Sign-On (SSO) systems?
What is the total number of networks available in IPv4 Class C?
The attribute whose value is derived from another attribute is called?
Consider the following C++ code snippet:
#include <iostream>
using namespace std;
int main() {
bool a = true;
bool b = false;
bool c = (a || b) && !(a && b);
bool d = a && !b;
cout << "Result: " << (c == d) << endl;
return 0;
}What is the output of the above program?
Which Linux command is used to display the current version of the kernel?
Consider the following NFA with $\varepsilon$-transitions:
| State | $a$ | $b$ | $\varepsilon$ |
|---|---|---|---|
| $\rightarrow q_0$ | $q_0$ | $q_1$ | — |
| $q_1$ | $q_2$ | — | — |
| $*q_2$ | $q_2$ | $q_0$ | $q_1$ |
Where $\rightarrow$ denotes the initial state and $*$ denotes the final state.
Using subset construction and considering only reachable DFA states, which of the following represents the set of states in the equivalent DFA?
In the context of database transactions, a shared lock allows which of the following operations?
According to the IEEE 802.3 standard, what is the maximum cable length of a single 100Base-TX Ethernet segment?
Assume all transactions are attempting to access the same database resource.
| Transaction | Operation Requested | Lock Type Requested |
|---|---|---|
| $T_1$ | Read | Shared (S-lock) |
| $T_2$ | Read | Shared (S-lock) |
| $T_3$ | Write | Exclusive (X-lock) |
| $T_4$ | Read | Shared (S-lock) |
Based on standard DBMS lock compatibility rules, which of the following statements is correct?
Assume all transactions are attempting to access the same database resource.
| Transaction | Operation Requested | Lock Type Requested |
|---|---|---|
| $T_1$ | Read | Shared (S-lock) |
| $T_2$ | Read | Shared (S-lock) |
| $T_3$ | Write | Exclusive (X-lock) |
| $T_4$ | Read | Shared (S-lock) |
Based on standard DBMS lock compatibility rules, which of the following statements is correct?
Which tag is used to create a table in the latest version of HTML?
Which of the following scenarios can lead to starvation in process scheduling?
Hyper-V is a product of which of the following?
Which of the following is a valid identifier in Python?
What is the effective encryption key length used by the Data Encryption Standard (DES), excluding parity bits?
Which of the following is not a linear data structure?
A Class B network with default mask 255.255.0.0 ($/16$) must be subnetted into at least $1024$ subnets. Which subnet mask should be used under modern subnetting rules?
In object-oriented programming, what is the mechanism called where one type is defined based on another type?
Which of the following web application attacks involves injecting malicious scripts into trusted websites to target users?
What is the number of pins in the Intel 8089 I/O processor?
Which of the following protocols is not part of the HTTP/HTTPS web communication protocol family?