C++ and Unix/Linux Basics Quiz
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Questions and Answers

What is the purpose of the new keyword in C++?

  • To declare a pointer
  • To set a pointer to NULL
  • To delete a variable
  • To create a dynamic variable or object and return a pointer to it (correct)

    • A dangling pointer refers to a pointer that points to a memory location that has been deleted.

    True

    What is recursion?

    The process where a function calls itself to solve a problem.

    One byte is equivalent to ______ bits.

    <p>8</p> Signup and view all the answers

    Match the following data types with their respective sizes in bytes:

    <p>Int = 4 bytes Char = 1 byte Double = 8 bytes Float = 4 bytes</p> Signup and view all the answers

    Which command is used to change file permissions in Unix/Linux?

    <p>chmod</p> Signup and view all the answers

    The command 'mkdir' is used to delete files in Unix/Linux.

    <p>False</p> Signup and view all the answers

    What does 'cin.clear()' do in C++?

    <p>It clears the error state of the input stream.</p> Signup and view all the answers

    The command 'ls -l' provides detailed information about files, including their ______.

    <p>permissions</p> Signup and view all the answers

    Which of the following is a persistent I/O manipulator for cin/cout?

    <p>fixed</p> Signup and view all the answers

    Match the following commands with their functions:

    <p>ls = List directory contents cd = Change directory cp = Copy files or directories rm = Remove files or directories</p> Signup and view all the answers

    In C++, the type specifier '%d' is used for floating-point numbers.

    <p>False</p> Signup and view all the answers

    What does 'argv' stand for in the context of command-line arguments?

    <p>Argument vector</p> Signup and view all the answers

    What is always stored in the first element of argv?

    <p>The name of the program being executed</p> Signup and view all the answers

    String streams can only be used to write to files.

    <p>False</p> Signup and view all the answers

    What is the output of a binary search on a sorted array if the target is not found?

    <p>The output will typically be an index indicating 'not found' or a boolean false.</p> Signup and view all the answers

    The __________ sorting algorithm repeatedly steps through the list, compares adjacent elements, and swaps them if they are in the wrong order.

    <p>Bubble Sort</p> Signup and view all the answers

    Match the following number systems with their characteristics:

    <p>Decimal = Base 10 Binary = Base 2 Hexadecimal = Base 16 Octal = Base 8</p> Signup and view all the answers

    Which operator is a unary operator among the following?

    <p>~</p> Signup and view all the answers

    In C++, when an array is passed to a function, a copy of the entire array is made.

    <p>False</p> Signup and view all the answers

    What must be included to use string streams in C++?

    <p>#include <sstream></p> Signup and view all the answers

    Study Notes

    CS 102 Final Study Guide

    • This is a study guide for the final exam. It is not exhaustive and should be used in conjunction with other learning materials.

    • Midterm 1 Content (Including chmod):

      • VIM:
        • What is VIM?
        • Different modes
        • Opening files from the command line
        • Entering/exiting insert mode
        • Saving and exiting VIM
      • Unix/Linux:
        • Overview of Unix/Linux commands (e.g., ls, cd, mkdir, rm, cp, ssh, scp, chmod)
        • Explanation of each command
        • Permission string meanings (for commands like ls -l)
        • Using chmod to change permissions for files and directories
        • Understanding octal number systems with chmod.
      • Input/Output:
        • Number system used with chmod (octal)
        • C++ input/output syntax (cin/cout)
          • Including necessary headers
          • cin.clear() and its function
          • cin.ignore() and its function
          • Wrapping cin in statements
        • Printf
          • Type specifiers (%f, %d, etc.)
          • Precision control
          • Left/right justification
        • I/O manipulators
          • Including headers
          • Persistent/non-persistent manipulators (setw(), setfill(), left, right, setprecision, fixed, showpoint, scientific, hex, dec).
      • Vectors:
        • Definition of vectors
        • Comparison to Java vectors
        • Vector declaration syntax
        • Accessing and assigning vector elements
        • Vector functions(.push_back(), size(), clear(), resize().)

    Midterm 2 Content

    • Searching algorithms:
      • Linear search
      • Binary search
    • Sorting Algorithms:
      • Bubble sort
      • Selection sort
    • Insertion Sort:
      • Number systems (decimal, binary, hex)
      • Conversion between number systems
    • Binary Operations:
      • Binary operations (e.g., &, |, ^, <<, >>, ~)
      • Understanding unary operators
      • Understanding the differences between << and >>
    • Binary Application:
      • Using bitwise operations (set, clear, test bit)
      • Understanding the ASCII table (understanding that each character has a numeric value)

    Pass-by-Value. Pass-by-Reference

    • Pass-by-value and pass-by-reference differences in function syntax, parameter passing and reference variables
    • Function calls and copy creation
    • Array and other data type automatic passing in C++

    Pointers

    • Pointer declaration and setting
    • Pointer dereferencing
    • Dynamic variable creation
    • Memory management (deletion and NULL pointers)
    • Errors: seg fault, dangling pointer, memory leaks

    File Streams

    • File streams Overview
    • Writing and reading to/from files using ifstream and ofstream
    • Opening, closing, checking for errors
    • Insertion/extraction operators
    • Error checking

    String Streams

    • Similarities/differences to console/file streams
    • Using istringstream and ostringstream
    • Writing to and extracting from strings
    • Insertion/extraction operators.

    Recursion

    • Definition of recursion
    • Function definition recognition of recursion
    • Parts of a recursive subroutine

    Data Types

    • Data type sizes in bytes.
    • Number of bits in a byte
    • Data type values ranges

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    CS 102 Final Study Guide PDF

    Description

    Test your knowledge on C++ programming concepts and Unix/Linux commands with this comprehensive quiz. From pointers to file permissions, challenge yourself on various fundamental topics. Perfect for beginners looking to solidify their understanding of these essential programming tools.

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