-1' OR 119=119 or 'TWTomLjH'='

It looks like a SQL injection payload. The fragment is designed to tamper with a SQL query so that it always evaluates to true, which can bypass authentication or expose data.

What the pieces imply (at a high level):

• -1' ends a string literal in SQL.
• OR 119=119 is a tautology (always true). If this is injected into a WHERE clause, it can override other conditions.
• or 'TWTomLjH'='... is trying to add more conditional logic by comparing string literals; depending on the rest of the query, this can be used to alter the result set or close out the original condition.

Why this matters:

• This is a classic example of SQL injection, where user-supplied input is concatenated into SQL statements. If the app builds queries by string concatenation, an attacker can manipulate the query logic.

Defensive measures (exam-relevant points):

• Use parameterized queries / prepared statements everywhere (do not concatenate user input into SQL).
  • Example (pseudocode):
    • SELECT id FROM users WHERE username = ? AND password = ?
• Use safe query builders or ORM tools that automatically bind parameters.
• Validate and sanitize inputs, but don’t rely on sanitization alone; validate types and length (e.g., usernames as text; IDs as integers).
• Enforce least privilege on the database account used by the application.
• Disable detailed error messages that reveal query structure; implement proper error handling.
• Consider using stored procedures with parameters (but still bind parameters correctly to avoid dynamic SQL).
• Implement input length caps and character whitelisting where appropriate.
• Add a Web Application Firewall (WAF) and use security testing (in a legal, controlled environment) to detect injection flaws.

If you’re prepping for an exam, you can expect to identify:

• The vulnerability type: SQL injection (boolean/tautology form).
• The safe remedy: parameterized queries, input validation, least privilege, and proper error handling.

Would you like a concrete, language-specific example (e.g., Java JDBC, Python with psycopg2, or PHP PDO) showing how to fix this kind of issue?