Accenture Interview Guide

Approach: Trace through line by line. Track variable values at each step. Factorial of n = n * (n-1) * ... * 1.

Approach: Check: initialization of low/high, loop condition (< vs <=), mid calculation, update of low/high after comparison.

Approach: Draw the recursion tree. Fib(n) = Fib(n-1) + Fib(n-2). Base cases: Fib(0)=0, Fib(1)=1.

Approach: Identify: initialization, condition, update, body. Trace first 2-3 iterations manually to see pattern.

Approach: Class = blueprint/template. Object = instance of class. Car class vs your specific car object.

Approach: Bundling data + methods. Access modifiers (private, public). Bank account: balance is private, accessed via methods.

Approach: Same method, different behaviors. Compile-time (overloading) vs runtime (overriding). Animal speak() method.

Approach: Constructor: same name as class, no return type, called on object creation. Method: any name, has return type, called explicitly.

Approach: Unique identifier for each row. Cannot be NULL. One per table. Examples: employee_id, ISBN.

Approach: DELETE = row by row, can have WHERE, can rollback. TRUNCATE = all rows, faster, cannot rollback usually.

Approach: Protocol suite for internet. TCP = reliable, ordered. IP = addressing, routing. Four layers: Application, Transport, Internet, Network Access.

Approach: HTTPS = HTTP + SSL/TLS encryption. Secure data transfer. Look for lock icon in browser. Port 443 vs 80.